In the first three options we can evaluate the values of x with the help of Sine Rule for all the triangles
The Rule says
Where a , b and c are the sides opposite to the angles A, B and C of any ΔABC.
Hence , in order to determine unknown values of sides or angles , we need any 3 values from all 3 sides and 3 angles in a triangle. First Three options give us three values but the last option gives only 2.
<span>We can have the basic inequalities and equalities’ sign. (>, =, <). </span> <span>These three set of symbols can discern, describe and explain the relationship between of numbers. These signs are used varying in many mathematical operations to explain and find discrepancy between value, sets of values or numbers in single and equitable category. </span> Examples includes 6 > 5; 6 is greater than 5; 5 is less than 6 <span> 1 > -1; -1 is less than 1; 1 is greater than -1 </span> <span>-2 = -2; -2 is equal to -2 <span> </span></span>